GOP Senate candidates say they share Trump's frustration with the broader immigration system while generally dodging on specifics about changing birthright citizenship, a concept based on the 14th Amendment of the Constitution.

But when asked on local radio station KTAR if she agreed with Trump about ending birthright citizenship and using an executive order to do it, she demurred.

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"In this case, if we secured our border, if we strengthened our immigration laws, if we closed the loopholes that are being taken advantage of right now we wouldn't even have this conversation," she said.

“This issue is a symptom of the larger problems we are facing. The reason we keep having this immigration discussion is because we have not passed immigration reform," Heller said in a statement sent to The Hill.

Heller instead attempted to put blame on Democrats for Congress's inability to pass immigration or border security legislation, saying he understands "the president’s frustration on immigration and border security because I am frustrated too.”

Trump this week reignited a fight over birthright citizenship as he leans into hardline immigration rhetoric in an attempt to drive out his base voters ahead of the midterm election on Tuesday, when control of Congress hangs in the balance.

"It was always told to me that you needed a constitutional amendment. Guess what? You don't," Trump said. "You can definitely do it with an act of Congress. But now they're saying I can do it just with an executive order."

Legal experts have said using an executive order to limit birthright citizenship to children of U.S. citizens and legal resident runs afoul of the 14th Amendment, which says “all persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside.”

Though the fight for the House includes Republican running in more moderate or blue districts, the battle for the Senate is largely taking place in red states won by Trump in 2016. And GOP Senate candidates have been less likely to break with Trump, whose base they will need if they want to win next week.

Democrats are defending 10 Senate seats in a state won by Trump in 2016. In several of those races, GOP candidates have either been silent, noncommittal or sidestepped questions about whether Trump can end birthright citizenship or if they would support a proposal halting it.

Florida Gov. Rick Scott (R) walked away from a reporter's question on Tuesday when asked about birthright citizenship, though an aide said he didn't hear the question. Scott said in a separate statement that he would need to review the proposal.

“I believe legal immigration makes us a better and stronger country, but illegal immigration does the opposite. I have not seen the details of what the president is suggesting," he said.

Hawley didn't directly say during a separate conference call with reporters on Wednesday if he supports ending birthright citizenship, but said it could "maybe" be done by executive order, according to The Washington Examiner.